求翻译：本单元的中心话题是旅游，课文主要讲述了一段沿湄公河的自行车旅行，学生通过课文追随这一段旅行，探讨与旅游相关的各种话题。本单元共包括热身、读前、阅读、理解、语言学习和语言运用六个部分，通过对本单元的学习，不仅可以使学生学到与旅游有关的语言知识和语言技能，还会使学生对旅游产生浓厚的兴趣，通过履行了解世界各地的文化，增强对祖国大好河山的热爱和国际意识进而培养学生的跨文化交际能力。是什么意思？

The central topic of this unit is tourism, the text focuses on the period of bicycle travel along the Mekong River, and students through the text to follow this period of travel, to explore a variety of topics related to travel. This unit consists of warm-up, before you read, read, understand, langu

This unit is the central topic, mainly about bedtime along the Mekong River, bike through textbooks, students follow the travel and to explore the travel-related variety of topics. This unit includes warm-up, read, read, understand, language learning and use of language, part 6 of this module, it wi

The central topic of this module is tourism, the text focuses on a bicycle trip along the Mekong, students through the text following that period of travel, exploration and tourism-related topics. This unit total including warm-up, and read Qian, and read, and understands, and language learning and